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  • Question
  • Who has discovered an Earth-sized planet, HD 21749b using Transiting Exoplanet Survey Satellite?


  • Options
  • A. ISRO
  • B. NASA
  • C. SpaceX
  • D. JAXA

  • Correct Answer
  • NASA 

    Explanation
    NASA's the Transiting Exoplanet Survey Satellite (TESS) has discovered an Earth-sized planet, HD 21749b and a "sub-Neptune" world, revolving around the star, HD 21749. The star lies 53 light-years from Earth. The research study has been published on 15th April, 2019 in 'The Astrophysical Journal Letters'. TESS was launched to Earth orbit in April 2018 on a SpaceX Falcon 9 rocket. One tool termed as 'Planet Finder Spectrograph' (PFS) on the 'Magellan II telescope' in Chile helped to confirm the planetary nature of the TESS signal and measure the mass of HD 21749b. HD 21749b is about 23 times heavier and 2.7 times wider than Earth. It is gaseous, has a substantial atmosphere but not as puffy as Uranus and Neptune. HD 21749b has an orbital period of 36 Earth days.

  • More questions

    • 1. Union Government signed USD 350 million loan agreement with which financial organisation for road projects in Madhya Pradesh?

    • Options
    • A. International Monetary Fund (IMF)
    • B. World Bank
    • C. New Development Bank
    • D. Asian Development Bank
    • Discuss
    • 2. The film, 'Pele: Birth of a Legend', is featured in the initial list of Oscar nomination for two categories Best Original Score and Original Song category. Which song from the movie has been selected as one of the nomination contenders?

    • Options
    • A. Against All Odds
    • B. Ginga
    • C. Locker Room
    • D. Conquering the Demons
    • Discuss
    • 3. Who is the author of the book "Every Time It Rains"?

    • Options
    • A. Vikram Seth
    • B. Nikitha Singh
    • C. Mahi Jadon
    • D. Amitav Ghosh
    • Discuss
    • 4. Which film has won the Golden Peacock award at the 2016 International Film Festival of India (IFFI)?

    • Options
    • A. Rauf
    • B. Daughter
    • C. The Throne
    • D. Cold of Kalandar
    • Discuss
    • 5. The world's largest open air theatre, 11-days Bargarh Dhanu Yatra that concluded in second week of January 2017 with the death King Kansa at the hands of his nephew Lord Krishna is held in which state?

    • Options
    • A. Bihar
    • B. Uttar Pradesh
    • C. Jharkhand
    • D. Odisha
    • Discuss
    • 6. Which Indian Film opens the 2018 London Indian Film Festival?

    • Options
    • A. Sanju
    • B. Race 3
    • C. Raazi
    • D. Love Sonia
    • Discuss
    • 7. Famous HIV/AIDS researcher Mark Wainberg passed away recently. He belonged to which country?

    • Options
    • A. USA
    • B. Canada
    • C. United Kingdom
    • D. Australia
    • Discuss
    • 8. Which film won the Best Foreign Film in Oscar 2019?

    • Options
    • A. Shoplifters
    • B. Cold War
    • C. Roma
    • D. Capernaum
    • Discuss
    • 9. Which Hockey team won Malaysia series?

    • Options
    • A. Germany
    • B. Spain
    • C. India
    • D. Malaysia
    • Discuss
    • 10. The Union Cabinet approved the signing of a new Air Services Agreement with this country recently.

    • Options
    • A. Poland
    • B. Germany
    • C. Serbia
    • D. Australia
    • Discuss


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